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我正在嘗試構建WYSIWYG編輯器使用MathJax編寫數學公式。我試圖從textarea中選擇隨機內容並將其粘貼到一個div中,以將其轉換爲數學等式。所見即所得編輯器使用MathJax的數學方程
<!DOCTYPE html>
<html>
<head>
<title>Wrap Selected Content with Dummy Editor</title>
<script type="text/javascript" src="https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>;
<script type="text/x-mathjax-config">
MathJax.Hub.Config({tex2jax: { inlineMath: [ ['$','$'], ['\\(','\\)'] ] } });
MathJax.Hub.Config({tex2jax: { displayMath: [ ['$$','$$'], ['\\(','\\)'] ] } });
</script>
</head>
<body>
<!--Select some random text from this textarea and click button -->
<textarea id="wrapSelectedContent"></textarea>
<!-- Content should be load here using JavaScript and Convert it into Mathematical Function -->
<div id="pasteSelectedContent" style="width:300px; height:300px; border:2px solid #000;"></div>
<!-- Static Content displayed Successfully -->
<p>$$\sum(a+b)(c+d)$$</p>
<button onclick="wrapContent();">Put Summation Sign</button>
<script type="text/javascript">
function wrapContent(){
var selectedContent = document.getElementById("wrapSelectedContent");
var pasteselectedContent = document.getElementById("pasteSelectedContent");
var textlength = selectedContent.textLength;
var start = selectedContent.selectionStart;
var end = selectedContent.selectionEnd;
selectedContent.focus();
selectedContent.setSelectionRange(start,end);
var selectedContentValue = selectedContent.value.substring(start, end);
var replace = "$$\\sum" + selectedContentValue + "$$";
pasteselectedContent.textContent = selectedContent.value.substring(0,start) + " " + replace + " " + selectedContent.value.substring(end,textlength);
console.log("Start Index : " + start);
console.log("End Index : " + end);
console.log("Text Content Length : " + textlength);
console.log(selectedContentValue);
}
</script>
</body>
</html>
所以,我怎麼可以轉換與數理方程的div#pasteSelectedContent顯示的文本 請幫我建立這個所見即所得的編輯器
「請幫助我[做我的整個項目]」在這裏真的不太好。你能指定你到底有什麼問題嗎?在textarea中選擇內容?粘貼到div?解析文本來理解它?將解析的文本打印爲數學?如果這些都是這些,那麼你咬掉的東西比咀嚼的更多。 – Teepeemm 2015-02-11 15:18:27
@Teepeemm我有問題解析文本到數學eq。這是由我給出的答案解決的 – 2015-02-11 18:45:52
未來的注意事項:cdn.mathjax.org即將結束其生命週期,請查看https://mathjax.org/cdn-shutting-down獲取遷移提示。 – 2017-04-13 13:19:40